Indian Oil Corporation [IOC] — Indane dealer took money without providing the bill and didnt deliver the cylinder

Address:

Domlur Bangalore

Indane dealer (Shirdi Sai Indane Gas Distributor Domlur) took money for new connection. They didn’t give me the bill, they said that I’ll get the bill after I get the cylinders. I was supposed to get the cylinders in 3 days, now it has been more than 8 days, and now they’re not even picking up the call.
I want to file a complaint for two reasons:
1. They took the money and didn’t provide the bill.
2. Didn’t deliver the cylinder on time.

I want Consumer Forum to hold IOC accountable for this. I checked that there are numerous complaints against this deliver on google and Consumer Forum, but it looks IOC doesn’t care one bit about its Consumers and is okay with its dealers harassing their customers.